CONTROL METHOD OF FRICTIONAL COUPLING DEVICE CAPABLE OF BEING ENGAGED AND DETACHED IN SHIFT DEVICE FOR AUTOMATIC TRANSMISSION OF AUTOMOBILE

摘要

PROBLEM TO BE SOLVED: To optimize the comfortableness at the time of starting of a shift without using a pressure sensor by obtaining a deviation between a real value and a target value of the transmission torque, and adding this deviation. SOLUTION: A multiplying position 15 forms a square of a function nM. A proportional device 16 considers a gain (k). A multiplying position 17 computes a torque converter torque Mr on the basis of the output variable of the proportional device 16 and an output variableλof a converter characteristic curve 14. A differentiating device 18 differentiates a revolution number (nr) of a turbine vane. A proportional device 19 forms an inertia torque Mθon the basis of the differentiated number (nr) of revolutions of the turbine vane. An adding position 20 adds the torque converter torque Mr and the inertia torque Mθso as to form a torque converter real value Mkup -ist. A proportional device 21 forms a transmission torque target value Mkup -soll on the basis of the pressure of a clutch. An adding position 22 forms a torque deviation dM, and an integrating device 23 adds this torque deviation dM.